Method op equalizing the dyeing qualities op artificial



Feb. 26, 1935 R. ELssNElg ETAL METHOD OF EQUALIZING THE DYEING QUALITI-ES 0F ARTIFICIAL FILAMENTS 4 sheets-sheet 1 Filed Feb. 13, 1955 Feb. 26,1935. ELSSNER r AL 1;,992,897

METHOD OF EQUALIZING THE DYEING QUALITIES OF ARTIFICIAL FILAMENTS FiledFeb. 13, 1935 4 Sheets-Shea}. 2

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Feb. 26, 1935. R. ELSSNEFVQ' ET AL I 1,992,897

METHOD OF EQUALIZING THE DYEING QUALITIES OF ARTIFICIAL FILAMENTS FiledFeb. .15, 1933 4 Sheet s-She et 4 5a? 'Eiqli'- .1111: U iz ll dit 2F/clmrd [Kris/re; 49 Pahfi (arfex Patented Feb. 26, 1935 I i 1,992,897

UNITED STATES PATENT OFFICE METHOD OF EQUALIZING THE DYEING QUALI'IIESOF ARTIFICIAL FILAMENTS Richard Elssner, Elizabethton, and Ralph H.Carter, Johnson City, Tenn., assignors to North American RayonCorporation, New York, N. Y., a corporation of Delaware ApplicationFebruary I3, 1933, Serial No. 656,538

8 Claims. (01. 18-8) This invention relates to angle axis Spinning ofthe filament driven roller and bearing means rollers for spinningmachines in the manufacas used in our preferred form;

ture of yarns of artificial origin, but primarily Figure 7 is a detailfront elevation of a modihas for its object the increase of thecoagulating fied form of our invention on a spinning machine;

length of the yarn between spinnerette and take- Figure 8 is a verticalsection of the parts shown 5 up roller or spool for the 1 purpose ofimproving in Figure 7;, the quality of the yarn. Figure 9 is an enlargedvertical section taken Another object of our present invention is anthrough the bracket and roller assembly shown improved roller means overwhich the green or in my modified form; I

10 freshly-extruded yarn passes before reaching the Figure 10' is a sideelevation of a modified form 10 thread guide and spool therebyincreasing the of a roller that may be used with our invention;coagulating length and eliminating unevenness Figure 11 is a verticalcross-sectional view of of dyeing and the resultant so-called flameeffect. a modified form of the bracket assembly with Still anotherobject of our present invention another modified form of roller beingused;

lies in providing an improved rollermeans over Figure 12 is a detailcross-section on the line 15 which the green yarn passes, which rollermeans 12 12 of Figure 11; and is" easily and quickly adjustable withrespect to Figure 13 is a side elevation of the roller used theadjusting of the spacing angle which deterin the form illustrated inFigure 11. mines the spacing and coagulating length of the In themanufacture of rayon by the spool yarn. spinning process, numerousdisadvantages arise 0 Further, another object of our invention is induring spinning, owing to the comparatively the use of the improvedroller means, power short coagulating distance between spinnerette beingapplied to one of the rollers to drive it at and spool, and it has beenfound that upon ina constant speed with relation to the take-up creasingthe coagulating length by placing rollspool for the purpose of creatinga gradual iners (grooved or otherwise) between the spin- 25 crease intension as the yarn body builds up on nerette and take-up spool for theyarn to pass the take-up spool or roller, which increase in over,unevenness in dyeing or flame effect of tension tends to eliminate theinside-outside dyegreen yarn, which is one of the main disadvaningdifierence. tages of spool spinning, is practically eliminated.

Another object of the present invention lies in By the application ofsuch rollers the physical 30 providing an improved roller means overwhich characteristics of the. yarn thus spun may also the green yarnpasses, one of said rollers being be changed to a certain extentaccording to the power-driven thereby enabling regulation in theapplication used. tightness with which the yarn body is wound. It hasalso been found that by power driving These and other objects of ourpresent invenone of the intermediate rollers at a constant 35 tion willin part be pointed out and in part bespeed with relation to the speed ofthe take-up come obvious from a study of the following despool that aslight tension is imparted towards scription and by reference to thedrawings atthe end of the spinning due to the fact that the tached, inwhich: yarn in building up enlarges in diameter, there- Figure 1 is afront elevation of a portion of a by increasing the peripheral speed andexerting 40 spinning machine with the preferred form of a slightincrease of tension which eliminates to our invention applied; a greatextent the inside-outside dyeing efiect.

Figure 2 is a vertical cross section taken on Referring now to thedrawings in which like the line 2-2 of Figure 1 looking in the directionnumerals indicate like parts and more particuof the arrows; larly toFigures 1 to 6, in which we have shown 45 a Figure 3 is an enlargedetail vertical section the preferred embodiment of our invention, 1 ofthe power driven roller as used in the preindicates the back board of aspinning machine,

ferred form of our invention; 2 the trough portion for holding thecoagulating Figure 4 is an enlarged detail vertical crossbath, and 3 asplash drain. section taken on the line 4-4 of Figure 3; The spinningsolution is passed through a pipe 50 Figure, 5 is a detail section ofthe manner of 4 to a pump 5 arfd forced through the candle attaching thebracket assembly of the filament filter 6 and thence through the gooseneck 7 and driven roller used in the preferred form of our finally,extruded through the spinnerette 8 and invention; passes through thecoagulating bath 9 which is Figure 6 is an enlarged detail verticalsection contained in the trough 2. 55

